count_chars
count_chars — Return information about characters used in a string
mixed count_chars ( string string [, int mode])
Which Counts the number of occurrences of every byte-value (0..255) in string and the output is returned in various ways.
Mode is an optional parameter , by default its 0.
Mode:
0 - an array with the byte-value as key and the frequency of every byte as value.
1 - same as 0 but only byte-values with a frequency greater than zero are listed.
2 - same as 0 but only byte-values with a frequency equal to zero are listed.
3 - a string containing all used byte-values is returned.
4 - a string containing all not used byte-values is returned.
<?php
$data = “hai how are you”;
$arr = count_chars($data, 1) ;
foreach($arr as $key => $val)
{
echo “Number of ‘”.chr($key).”‘ is: “.$val.”
“;
}
?>
